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Finding the Fourth Proportional to 128,475.94, 192,603.16 and 49,645.48

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Solution

The fourth proportional to 128,475.94, 192,603.16 and 49,645.48 is: 74,425.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,475.94 : 192,603.16 = 49,645.48 : x
  2. Step 2: Convert to fraction form
    128,475.94/192,603.16 = 49,645.48/x
  3. Step 3: Cross multiply
    128,475.94x = 192,603.16 × 49,645.48
  4. Step 4: Simplify right side
    128,475.94x = 9,561,876,327.72
  5. Step 5: Solve for x
    x = 9,561,876,327.72/128,475.94
  6. Step 6: Final answer
    x = 74,425.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.